Hi!
Pale Carnations is a game where choices COUNT! From the beginning onward your choices shape the way our hero's story goes. And the longer the games moves forward, these events add up. Naturally there are paths no longer available or only open to you due to what you did before.
You will rise and thrive under Kath if you are playing an asshole. You will never get good relations with the Carnations if you treat them like dirt. Ian will only be your bro through thick and thin if you work on your friendship and are there for him. Sophia will only approach you if she likes you, which depends on your actions before. Hana prefers a halfway decent guy as her boyfriend, so somone screaming "I love the club" each time he can do so, will not gain her heart. And so on.
PC is not a typical harem sim where "choices" boil down to "you will meet girl C now. Yes/No". Every fan of Pale Carnations has several playthroughs saved. I, for example, have three "main" playthroughs and a couple side ones as well.
As for the "Elias Sim", I fear you missed out a lot if you believe this to be the case. We learn a lot about the Club, it´s VIP members, several other characters along with other info. For instance, Andrea is the only house girl who calls August by his nickname. While not an enormous bomb, it still is interesting why. Some events and info is only available on certain paths through the game. So it is not simply an Elias Simulator.